Why did umbrella corporation make the T virus?

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Tags

1. #corporation
2. #created
3. #virus
4. #progenitor
5. #derived
6. #known
7. #mutagenic
8. #development
9. #biological
10. #umbrella
11. #strain
12. #properties
13. #weapon
14. #tyrant
15. #designed
16. #advantage